bed-con 2016 - i have a stream - einsichten in reactive programming
TRANSCRIPT
Moin BED-Con!
@wps_de
wps_de
https://www.wps.de
Reactive may refer to:
Generally, capable of having a reaction (disambiguation)
-Wikipedia
Reactive programming is
a programming paradigm…
-Wikipedia
R1.1(V0[:sig]) => R0 R1.2(V0[:m x sig]) => R0 0 => i | m + 1 => j [W [ i < j -> [ R1.1(V0[i: m x sig]) => R0 | i + 1 => i ] ] ] END R1.3() => R0 'H';'e';'l';'l';'o';',';' ';'w';'o';'r';'l';'d';'!' => Z0[: m x sig] R1.2(Z0) => R0 END
OOP to me means
only messaging, local retention and protection and hiding of state-process, and extreme late-binding of all things.
-Alan Kay
OOP to me means
only messaging, local retention and protection and hiding of state-process, and extreme late-binding of all things.
-Alan Kay
Purely functional programming
is different. You don’t tell the computer what to do – you tell him what stuff is.
-Miran Lipovaca
Purely functional programming
is different. You don’t tell the computer what to do – you tell him what stuff is.
-Miran Lipovaca
fib 0 = 0fib 1 = 1fib n = fib (n-1) + fib (n-2)
𝑓1 = 𝑓2 = 1𝑓𝑛 = 𝑓𝑛−1 + 𝑓𝑛−2 für 𝑛 > 2
Reactive programming is
a programming paradigm oriented around data flows and the propagation of change.
-Wikipedia
[ 1, 1, 2, 3, 5, 8, 13 ]
.filter(x -> x%2 == 0)
[ 2, 8 ]
x=100 x=234 x=234 x=144 x=305
y=1 y=634 y=137 y=680 y=32[ , , , , ->
.filter(c -> c.x > 200)
y=634 y=137 y=32
x=234 x=234 x=305[ , , ->
http://reactivex.io/
Subscription s = Observable.just("Hello, world!")
.subscribe(new Subscriber<String>() {
@Override
public void onCompleted() {
// do sth
}
@Override
public void onError(Throwable e) {
// handle error stuff
}
@Override
public void onNext(String s) {
// next!
}
}
);
public class ColdExample {
public static void main(String[] args){
ArrayList<Integer> sampleList = new ArrayList<>();
for(int i = 0; i<5; i++){
sampleList.add(i);
}
Observable.from(sampleList)
.observeOn(Schedulers.computation())
.toBlocking()
.forEach(System.out::println);
}
}
public static Observable<Integer> hotStream() {
return Observable.create((Subscriber<? super Integer> s) -> {
int i = 0;
while (!s.isUnsubscribed()) {
s.onNext(i++);
try {
Thread.sleep((long) (Math.random() * 100));
} catch (Exception e) {
// do nothing
}
}
}).subscribeOn(Schedulers.newThread());
}
taken from https://github.com/jhusain/learnrxjava
http://reactivex.io/languages.html
Java
JavaScript
C#
C#(Unity)
Scala
Clojure
C++
Ruby
Python
Groovy
JRuby
Kotlin
Swift
http://reactivex.io/tutorials.html
2 minute introduction to Rx by André Staltz
A Playful Introduction to Rx a video lecture by Erik Meijer
http://rxmarbles.com/
